Reversal: Neurobiological Origin of Attention Deficit Disorder Discovered

From http://www.iflscience.com/brain/neur...der-discovered

However, the way that ADD is understood and treated could be about to change considerably. A large collaborative study led by Michael Reber of the University of Strasbourg has confirmed the biological origin of the disorder. The results were published in an open-access format in the journal Brain Structure & Function.

The superior colliculus is found in the midbrain and has many sensory- and motor-related functions. The researchers introduced a population of mice to a genetic mutation which doubled the connections between the retina and superior colliculus, creating visual hyperstimulation. Those with the mutation also had a superior colliculus with a buildup of the neurotransmitter noradrenaline, which is “fight or flight” molecule that increases heart rate and prepares the body to react to a stimulus.
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